Reading everyone's posts is something you should do period. You aren't going to understand the story down the road if you only pay attention to what's happening around your character. Like, duh.

...But if you're going to complain that you did something in a room with ten other characters and most of them didn't respond to it, I think you're being unreasonable. I dislike (but will read) a post that does nothing but parrot what everyone else already did. Yes, you can write what a few characters were doing prior to interacting with them, or before you have some sort of reaction to them. But there's really no point in mentioning the actions of every character as they happen around you. If my character throws a pencil at another character, and there are 8 other characters in the room, I'll be okay if the players controlling those 8 other characters do not see a need to personally narrate my pencil throw. I also think in a room filled with 10 people, there's a chance some of them wouldn't notice what was going on because of other activities. Not everyone has perfect situational awareness.

[quote=@SleepingSilence]
A character tells a 2nd character whose eating "I see you're eating chicken, I like that too." If you wrote that you ate lettuce in your last post. You don't need to bitch incessantly in OOC that you're character is a vegetarian and they should know that (they don't, the character just met you.) and blah blah. Just write "Need to check you're eyeballs, this is lettuce" 2nd character said. Crisis averted.
[/quote]

I would love to agree with this, but...

Some people actually feel that if your character hates their character, you are actually hating them. So by telling them that they need to check their eyeballs, that could be seen as passively telling the other player that they aren't being observant. This stirs up the OOC drama that you were trying to avoid. That's not to say this method doesn't work, but you need to be careful with the wording, and who you use it on.